EARTH SCIENCE>SPECTRAL/ENGINEERING>RADAR
No constraints but users need to be registered with [the G-portal User Registration system](https://gportal.jaxa.jp/gpr/user/regist1?lang=en) to download files.
JERS-1/SAR L0 SAR Data is obtained from the SAR sensor onboard JERS-1 and produced by National Space Development Agency of Japan (NASDA).JERS-1 which mounts SAR is Sun-synchronous sub-recurrent Orbit satellite launched on February 11, 1992. This dataset includes Unprocessed Signal Data Product Data. Data which has undergone absolutely no correction is recorded. Data required for higher level correction is ALOS recorded. It is same as the unprocessed data of other sensors prepared at the EOC. The provided format is CEOS.
The user is entitled to use G-Portal data free of charge without any restrictions (including commercial use) except for the condition about acknowledgement of data credit as stipulated in G-portal terms of use 7.(2).Click [here](https://gportal.jaxa.jp/gpr/index/eula?lang=en) for detailed G-Portal data usage constrains.
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